00322nam a2200121Ia 4500008004100000022001400041040001100055100002000066245002400086260006300110300001700173300001000190251112s9999||||xx |||||||||||||| ||und||  a0022-538X  aCNCLSA  aThomas E. Shenk 0aJournal of Virology  cMarch, 1997bAmerican Society for MicrobiologyaWashington  aP. 1739-3363  bV. 71